Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3d10f787dded6c…

MALICIOUS

PDF

52.5 KB Created: 2020-09-21 01:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d7e34bf366948b085aae3d290982471b SHA-1: 1a01191aec2a6202a819e2f626937fe07da68484 SHA-256: 8b3d10f787dded6c6e627dbe2f1a33de11cd0a7478f36d3a6d39d166234a00f5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.me' and a link farm pointing to various PDF files hosted on external domains. The document body, though partially corrupted, suggests a lure related to 'Ncaa basketball recruiting manual', aiming to entice users to click these malicious links. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=ncaa+basketball+recruiting+manual In PDF document text
    • http://tofotu.bigairmarketingproducts.com/uploads/1/3/0/7/130740019/wivizadisivakunetu.pdfIn PDF document text
    • http://suriraz.basilyates.com/uploads/1/3/1/6/131606457/623440.pdfIn PDF document text
    • http://mutexokun.revealedheart.com/uploads/1/3/1/4/131483154/xopobox.pdfIn PDF document text
    • http://files.hoffmannlabradors.com/uploads/1/3/1/1/131163620/4654660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/38178114659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/temperate_forest_biome.pdfIn PDF document text
    • https://21e4cd1a-bcbc-42b8-8dcc-f097c6bf734e.filesusr.com/ugd/120874_8f7460bd2dab46a388371de2ffaffe6a.pdf?index=trueIn PDF document text
    • https://5c5e4037-eb56-47b4-ad19-b8d0f96f0f9d.filesusr.com/ugd/7182f3_2a051093ec4f4dbc97981473e1bd9a8e.pdf?index=trueIn PDF document text
    • https://abca47a5-ca8e-4b28-805e-a8369e45d0c1.filesusr.com/ugd/c6ac46_a51de462b6ce467182c891708d445021.pdf?index=trueIn PDF document text
    • https://51833edb-4d57-48f5-a46d-c42d3132a53e.filesusr.com/ugd/1b0481_73cf4d5e64954a91901441763cd73004.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5235/8042/files/pifukozawupotaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/vowokorexuwizilaxefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/sda_church_elders_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0472/3212/3045/files/fairy_tail_filler_blmler.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D3 3304 bytes
SHA-256: e9df1abf47a688c52bbf36275161d4c71dd3d5463c3e540779115c3c600865d9
font_01_sfnt_off000084b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B9 5292 bytes
SHA-256: c19f9af7981aba3f0f66d565a158cce41327e95e2cb6c3a7014dcaa3c33143eb
font_02_sfnt_off000096ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AD 14564 bytes
SHA-256: 61340682128b75c29426db9b3161f3d8d132ae15199bb980fa8f8b022092df5f

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